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US3570199A Expired / Lapsed US ⏱️ 0.0 years remaining

Fireproof partitions

Assignee: DeSoto Inc
•
Filing: 1968-10-25
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Granted: 1971-03-16
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Expires: 1988-10-25
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Abstract

Abstract A PARTITION FOR PROVIDING THERMAL INSULATION TO A REGION ON AT LEAST ONE SIDE THEREOF FROM SOURCES OF INTENSE HEAT. THE PARTITION COMPRISES A WALL MEMBER WHICH CONTAINS WITHIN RIGID OUTER WALLS A SHEET-LIKE INSULATING MEMBER OF AT LEAST TOW LAYERS. ONE OF THE LAYERS, WHICH FACES THE SOURCE OF HEAT, COMPRISES FIBROUS MATERIAL HAVING HIGH TEMPERATURE RESISTANCE, WHILE THE OUTER LAYER COMPRISES A POROUS CARRIER, PREFERABLY HAVING HEAT INSULATING PROPERTIES, CONTAINING LIQUID WATER INTERSPERSED THROUGHOUT THE PORES OF THE CARRIER. THE CARRIER IS ENCLOSED IN A WATER IMPERMEABLE CASING WHICH RUPTURES UPON EXPOSURE TO ELEVATED TEMPERATURES. TYPICALLY, A PLURALITY OF WALL MEMBERS OF THE ABOVE CONSTRUCTION ABUT EACH OTHER TO FORM A HEAT RESISTANT WALL.

Inventors

  • 👤 William J Gartner

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 11:49
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/74; E04B2/7401; E04B2/7403

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-03-15 1974-09-14 1975-03-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-03-15 1978-09-14 1979-03-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-03-15 1982-09-14 1983-03-16 $7700.00 Window Closed / Lapsed

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